咖啡对表面密封剂保护的树脂复合材料的反射率和化学性质的影响。

Influence of coffee on reflectance and chemistry of resin composite protected by surface sealant.

作者信息

Soares Luís Eduardo Silva, Cesar Ilene Cristine Rosia, Santos Carla Gabriela Couto, De Cardoso Ana Luiza Merigo Oliveira, Liporoni Priscila Christiane Suzy, Munin Egberto, Martin Airton Abrahão

机构信息

Biomedical Vibrational Spectroscopy Laboratory, Research and Development Institute, University of Vale do Paraiba-UNIVAP, Av. Shishima Hifumi, 2911, Urbanova, 12,244-000, São José dos Campos, SP, Brazil.

出版信息

Am J Dent. 2007 Oct;20(5):299-304.

PMID:17993026

Abstract

PURPOSE

To assess the influence of the light-curing unit type and whether or not it was worth using surface sealant protection on resin composite restorative materials stained by coffee. Another objective was to propose the monitoring of coffee staining by FT-Raman spectroscopy using carbon-hydrogen (C-H) bonds as reference to the composite matrix degradation.

METHODS

Sixty cylindrical specimens of resin composite were prepared and divided into six groups: HC (control)--cured with a halogen light; LC (control) cured with a LED; HF--cured with a halogen light + Fortify Plus; LF--cured with a LED + Fortify Plus; HP--cured with a halogen light + PermaSeal; LP--cured with a LED + PermaSeal. After storage for 24 hours at 37% and 100% of relative humidity, the top surface was protected, and the other surfaces isolated. Polishing with paper discs was performed after 24 hours of curing and prior to FT-Raman spectroscopy and reflectance measurements. All specimens were submitted to coffee staining for 14 days and evaluated by both systems. Results were statistically analyzed by ANOVA and Tukey tests.

RESULTS

FT-Raman spectrum only showed significant changes in groups LC and LP (P< 0.05). Reflectance demonstrated that staining was present in all specimens protected by sealants. Sealant staining was larger in the HF (P < 0.001) group.

摘要

目的

评估光固化灯类型以及使用表面封闭剂保护对被咖啡染色的树脂复合材料修复材料的影响。另一个目的是提出使用傅里叶变换拉曼光谱法以碳氢键作为复合基质降解的参考来监测咖啡染色情况。

方法

制备60个树脂复合材料圆柱形试件，并分为六组：HC（对照组）——用卤素灯固化；LC（对照组）用发光二极管固化；HF——用卤素灯 + Fortify Plus固化；LF——用发光二极管 + Fortify Plus固化；HP——用卤素灯 + PermaSeal固化；LP——用发光二极管 + PermaSeal固化。在37%和100%相对湿度下储存24小时后，保护顶面，隔离其他表面。在固化24小时后、进行傅里叶变换拉曼光谱分析和反射率测量之前，用纸质圆盘进行抛光。所有试件均进行14天的咖啡染色处理，并通过两种系统进行评估。结果采用方差分析和Tukey检验进行统计学分析。